fix(cli): gracefully handle prompt cancellation and validate template…

[shobhitagnihotri69]

Summary

When running create-bubblelab-app, pressing Ctrl+C or cancelling prompts midway left projectName populated while template was undefined. The CLI would create an empty target directory and crash with ENOENT while attempting to copy templates/undefined.

Changes

• Added onCancel handler to prompts to cleanly exit with code 0 on user cancellation.
• Validated that required fields (projectName, template, googleApiKey) are present before touching the filesystem.
• Added fs.existsSync guard for templateDir.

Summary by CodeRabbit

• Bug Fixes
  • Improved cancellation handling during project setup with a clear notification and successful exit.
  • Added validation to ensure all required project details are provided.
  • Added an error message when the selected template cannot be found.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: c945ea89-337c-4604-94d5-df33128cedad

📥 Commits

Reviewing files that changed from the base of the PR and between e64b246 and 5f0a248.

📒 Files selected for processing (1)

• packages/create-bubblelab-app/bin/cli.js

Included review availability: Your plan provides up to 4 included reviews per hour; 3 remain after this review.

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📝 Walkthrough

Walkthrough

The CLI now handles prompt cancellation with a yellow message and exit code 0. It validates projectName, template, and googleApiKey, and reports missing template directories before copying.

Changes

CLI validation flow

Layer / File(s)	Summary
Prompt cancellation and template checks packages/create-bubblelab-app/bin/cli.js	The CLI handles cancelled or incomplete prompts with a yellow message and exit code 0. It computes templateDir before use and exits with a red error when the directory does not exist.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to 5f0a2

The CLI now exits cleanly when setup is cancelled and reports missing required inputs or template directories before creating files. No current merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main changes: graceful prompt cancellation and template validation. It is concise and specific enough for the pull request history.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

• Fix all pre-merge checks with AI

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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